초록 ▼

A multi-layer tube comprises a metal tube having an outer surface and a zinc layer bonded to the metal tube outer surface, wherein the zinc layer is selected from the group consisting of zinc plating, zinc nickel alloys, zinc cobalt alloys, zinc aluminum alloys, and mixtures thereof. A surface treat

A multi-layer tube comprises a metal tube having an outer surface and a zinc layer bonded to the metal tube outer surface, wherein the zinc layer is selected from the group consisting of zinc plating, zinc nickel alloys, zinc cobalt alloys, zinc aluminum alloys, and mixtures thereof. A surface treatment layer is bonded to the zinc layer, wherein the surface treatment layer is selected from the group consisting of a zinc/aluminum/rare earth alloy, phosphate, chromate and mixtures thereof. A first polymeric layer is bonded to the surface treatment layer, wherein the first polymeric layer is selected from the group consisting of a thermoplastic elastomer, an ionomer, a nylon, a fluoropolymer, and mixtures thereof. A second polymeric layer is bonded to the first polymeric layer, wherein the second polymeric layer is selected from the group consisting of a nylon, a thermoplastic elastomer, a fluoropolymer, and mixtures thereof. A process for manufacturing a multi-layer tubing for conveying fluids in a vehicle system comprises the step of extruding multiple layers of a melt-processible thermoplastic to a pretreated metal tube having an external surface with at least a zinc based coating and a sealant coating on top of the zinc based coating.

대표청구항 ▼

[ What is claimed is:] [1.] A multi-layer tube, comprising:a metal tube having an outer surface;a surface treatment layer bonded to the outer surface of the metal tube, wherein the surface treatment layer is selected from the group consisting of a zinc/aluminum/rare earth alloy, phosphate, chromate,

[ What is claimed is:] [1.] A multi-layer tube, comprising:a metal tube having an outer surface;a surface treatment layer bonded to the outer surface of the metal tube, wherein the surface treatment layer is selected from the group consisting of a zinc/aluminum/rare earth alloy, phosphate, chromate, and mixtures thereof;a first polymeric layer bonded directly to the surface treatment layer, wherein the first polymeric layer is a thermoplastic material selected from the group consisting of thermoplastic elastomers, ionomers, nylons, fluoropolymers, and mixtures thereof;a second polymeric layer bonded to the first polymeric layer, wherein the second polymeric layer is a thermoplastic material selected from the group consisting of nylons, thermoplastic elastomers, fluoropolymers, and mixtures thereof; anda third polymeric layer interposed between, and bonded to the first and second polymeric layers, wherein the third polymeric layer is a thermoplastic material selected from the group consisting of ionomers, nylons, ethylene vinyl alcohol, polyolefins, and mixtures thereof.